Writing pads or tablets



May 30, 1967 R. V. LANGBART WRITING PADS OR TABLETS Fiied Aug. 10, 19642 Sheets-Sheet l INVENTOR y 1967 R. v. LANGBART WRITING PADS OR TABLETS2 Sheets-Sheet 2 Filed Aug. 10, 1964 T R A R 00 T TM M N EL/ 6 V V A N Df L 1. A A m N m Y E B R United States Patent 3,321,849 WRITING PAD 0RTABLETS Reginaid V. Langbart, Northampton, England, assignor to R. V.Langhart Limited, trading as T. X. lProdnets Co.

Filed Aug. 10, 1964, Ser. No. 388,407 2 tClaims. (tCl. 35-61) Thisinvention is for improvements in or relating to writing pads or tabletsof the type having a semi-trans parent sheet of material sandwichedbetween a sheet or plate covered with a dark coloured adhesive layer anda protective sheet such that when the semi-transparent sheet of materialis pressed onto the dark coloured adhesive layer an image of the areasof the semi-transparent sheet which have been pressed onto the darkcoloured adhesive layer become visible. The protective sheet is usuallya transparent sheet, such as for example, celluloid.

The tablet or writing pad which this invention is concerned with is suchthat notes may be written by means of an instrument having a blunt orrounded end which presses the semi-transparent sheet into contact withthe adhesive layer and obliteration of the Written matter is efiected bymeans which separate the semi-transparent sheet from the adhesive layer.

It is with means for effecting the separation that the present inventionis particularly concerned.

In particular, the present invention provides a writing pad of the typedescribed having a slider extending the width of the tablet andextending between the semi-transparent sheet of material and the darkcoloured adhesive layer, said slider having a pair of slots separated byfinger engaging means and a flexible band secured adjacent either end ofthe pad and extending through the slots in the slider so that the slidermay move freely from one end of the pad to the other so as to separatethe semi-transparent sheet from the dark coloured adhesive layer. Con-Veniently the band is of flexible plastic material and is secured to theunderside of the base for the pad. Conveniently also the slider is ofmoulded plastic material, formed from sheet plastic material the slotsand the finger engaging means being stamped or pressed out or otherwisemoulded during the formation of the slider.

In order that the present invention may be more readily understoodreference will now be made to the accompanying drawings, in which:

FIGURE 1 is a perspective View of a writing pad or tablet according tothe present invention;

FIGURE 2 is a cross sectional view thereof;

FIGURE 3 is a detailed perspective view of a slider and flexible bandaccording to the present invention;

FIGURE 4 is a partly exploded view of an alternative construction of awriting pad or tablet according to the present invention;

FIGURE 5 is a plan view of FIGURE 4.

In FIGURES 1, 2 and 3 there is illustrated a baseboard 1, on which issecured, as a separate unit, a writing pad or tablet according to thepresent invention. The Writing pad comprises a layer 2 of transparentmaterial which has beneath it a sheet of semi-transparent material andbeneath that sheet a layer or dark coloured adhesive material. A slider3 extends beneath the layer of semi-transparent material and above thelayer or dark coloured adhesive material and is slidable along thelength of the pad by having a pair of slots 7 through which a band 4 offlexible plastic material extends. The band 4 is turned over and securedto the underside of a board 5. Finger engaging means 8 comprising raisedrim apertures sepa- Tilt: uipstanding projections 13 formed when formingthe s o s It will be appreciated that the slider 3 may be moved freelyalong the length of the pad and is located in position by its connectionto the band 4.

In the construction illustrated in FIGURES 1, 2 and 3 the pad ispreformed as a separate unit and is then secured to the board 1.

In the construction illustrated in FIGURES 4 and 5 the writing pad andsurrounding board are formed as one unit and comprise a rear face 9 anda front face 10, which may be folded from a unitary shape of reinforcedmaterial such as, for example, cardboard. The front face It has a cutout aperture 11 through which the writing pad 12 is observed. Thewriting pad 12 consists as previously described of a layer oftransparent material a, a layer of semi-transparent material 12 and alayer of dark coloured adhesive material 0. The flexible band 4 issecured to the rear face 9 and the slider 3 is as described, withreference to FIGURES 1, 2 and 3. After locating the writing pad with theband 4 and slider 3 relative to the rear face 9 the front face 10 maythen be secured thereto by applying adhesive around the edges, thusforming a unitary construction on which printed material may be appliedsurrounding the aperture 11.

It will be appreciated that the present invention provides a novel andconvenient form of slider for use With writing pads or tablets of thetype described.

The invention has particular application for the formation of writingpads or tablets for use by children wherein printed matter suitable forchildren may surround the writing pads or tablets.

It will also be appreciated that the present invention provides aconstruction which is particularly simple to manufacture and which iscomparatively cheap in cost since the materials involved to provide asatisfactory separation of the semi-transparent sheet from the darkcoloured adhesive layer are themselves of comparatively cheap and simpleform.

What I claim is:

I. A writing pad of the type described having a slider extending thewidth of the tablet and extending between the semi-transparent sheet ofmaterial and the dark coloured adhesive layer, said slider having a pairof slots separated by finger engaging means, and a flexible band securedadjacent to either end of the pad, and extending through the slots inthe slider, so that the slider may move freely from one end of the padto the other, to separate the semi-transparent sheet from the darkcoloured adhesive layer.

2. A pad according to claim 1 in which the band is formed of flexiblesynthetic plastics material, and is secured to the underside of the baseof the pad.

References Cited FOREIGN PATENTS 1,178,213 12/1958 France.

EUGENE R. CAPOZIO, Primary Examiner. H. S. SKOGQUIST, AssistantExaminer.

1. A WRITING PAD OF THE TYPE DESCRIBED HAVING A SLIDER EXTENDING THEWIDTH OF THE TABLET AND EXTENDING BETWEEN THE SEMI-TRANSPARENT SHEET OFMATERIAL AND THE DARK COLOURED ADHESIVE LAYER, SAID SLIDER HAVING A PAIROF SLOTS SEPARATED BY FINGER ENGAGING MEANS, AND A FLEXIBLE BAND SECUREDADJACENT TO EITHER END OF THE PAD , AND EXTENDING THROUGH THE SLOTS INTHE SLIDER, SO THAT THE SLIDER MAY MOVE FREELY FROM ONE END OF THE PADTO THE OTHER, TO SEPARATE THE SEMI-TRANSPARENT SHEET FROM THE DARKCOLOURED ADHESIVE LAYER.